A bottle, which contains 200 ml of 0.1 M KOH , absorbs 1 millimole of CO 2 from the air. If the solution is then treated with standard acid using phenolphthalein indicator, the normality will be

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A bottle, which contains 200 ml of 0.1 M KOH , absorbs 1 millimole of CO 2 ​ from the air. If the solution is then treated with standard acid using phenolphthalein indicator, the normality will be

TestHub · Accepted Answer

2 K O H + C O 2 ​ ⟶ K 2 ​ C O 3 ​ + H 2 ​ O m . m o l = 20 1 0 18 - 1 mi ll i e q u i v a l e n t o f a c i d = mi ll i e q u i v a l e n t o f K 2 ​ C O 3 ​ + mi ll i e q u i v a l e n t o f K O H = 1 + 18 = 19 N = V ( m l ) 19 mi ll i e q u i v a l e n t ​ = 200 19 ​ = 0.095 N

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